diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -807,7 +807,7 @@
 set(prefix ${CMAKE_INSTALL_PREFIX})
 set(exec_prefix \${prefix})
 set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
-set(includedir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR})
+set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
 set(PACKAGE_NAME ${PROJECT_NAME})
 set(PACKAGE_VERSION ${arpack_ng_VERSION})
 set(PACKAGE_URL "https://github.com/opencollab/arpack-ng/")
@@ -830,15 +830,15 @@
 endforeach()
 string(REPLACE ";" " " PARPACK_PC_LIBS_PRIVATE "${PARPACK_PC_LIBS_PRIVATE}")
 
-configure_file(pkg-config/arpack.pc.in "${PROJECT_BINARY_DIR}/arpack${LIBSUFFIX}${ITF64SUFFIX}.pc" @ONLY)
-configure_file(pkg-config/parpack.pc.in "${PROJECT_BINARY_DIR}/parpack${LIBSUFFIX}${ITF64SUFFIX}.pc" @ONLY)
+configure_file(SRC/arpack.pc.in "${PROJECT_BINARY_DIR}/SRC/arpack${LIBSUFFIX}${ITF64SUFFIX}.pc" @ONLY)
+configure_file(PARPACK/SRC/MPI/parpack.pc.in "${PROJECT_BINARY_DIR}/PARPACK/SRC/MPI/parpack${LIBSUFFIX}${ITF64SUFFIX}.pc" @ONLY)
 
 install(TARGETS arpack
     EXPORT arpackngTargets
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-install(FILES "${PROJECT_BINARY_DIR}/arpack${LIBSUFFIX}${ITF64SUFFIX}.pc"
+install(FILES "${PROJECT_BINARY_DIR}/SRC/arpack${LIBSUFFIX}${ITF64SUFFIX}.pc"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 
 if (MPI)
@@ -847,7 +847,7 @@
       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
       LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
       RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-  install(FILES "${PROJECT_BINARY_DIR}/parpack${LIBSUFFIX}${ITF64SUFFIX}.pc"
+  install(FILES "${PROJECT_BINARY_DIR}/PARPACK/SRC/MPI/parpack${LIBSUFFIX}${ITF64SUFFIX}.pc"
       DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 endif ()
 
diff --git a/Makefile.am b/Makefile.am
--- a/Makefile.am
+++ b/Makefile.am
@@ -26,8 +26,3 @@
 
 EXTRA_DIST = README.md PARPACK_CHANGES CHANGES DOCUMENTS VISUAL_STUDIO \
 detect_arpack_bug.m4 CMakeLists.txt
-
-pkgconfig_DATA = arpack@LIBSUFFIX@@ITF64SUFFIX@.pc parpack@LIBSUFFIX@@ITF64SUFFIX@.pc
-
-# Due to the LIBSUFFIX/ITF64SUFFIX, configure doesn't automatically clean this file:
-DISTCLEANFILES = arpack@LIBSUFFIX@@ITF64SUFFIX@.pc parpack@LIBSUFFIX@@ITF64SUFFIX@.pc
diff --git a/PARPACK/SRC/MPI/Makefile.am b/PARPACK/SRC/MPI/Makefile.am
--- a/PARPACK/SRC/MPI/Makefile.am
+++ b/PARPACK/SRC/MPI/Makefile.am
@@ -46,3 +46,8 @@
 libparpack@LIBSUFFIX@@ITF64SUFFIX@_la_LIBADD += $(top_builddir)/ICB/libdbgicb.la $(top_builddir)/ICB/libstaicb.la
 libparpack@LIBSUFFIX@@ITF64SUFFIX@_la_CPPFLAGS = $(AM_CPPFLAGS) -I$(top_builddir)
 endif
+
+pkgconfig_DATA = parpack@LIBSUFFIX@@ITF64SUFFIX@.pc
+
+# Due to the LIBSUFFIX/ITF64SUFFIX, configure doesn't automatically clean this file:
+DISTCLEANFILES = parpack@LIBSUFFIX@@ITF64SUFFIX@.pc
diff --git a/pkg-config/parpack.pc.in b/PARPACK/SRC/MPI/parpack.pc.in
rename from pkg-config/parpack.pc.in
rename to PARPACK/SRC/MPI/parpack.pc.in
--- a/pkg-config/parpack.pc.in
+++ b/PARPACK/SRC/MPI/parpack.pc.in
@@ -1,7 +1,7 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
-includedir=@includedir@/arpack@ITF64SUFFIX@
+includedir=@includedir@
 
 Name: @PACKAGE_NAME@
 Description: Collection of Fortran77 subroutines designed to solve large scale eigenvalue problems
@@ -10,4 +10,4 @@
 Requires.private: arpack@LIBSUFFIX@@ITF64SUFFIX@
 Libs: -L${libdir} -lparpack@LIBSUFFIX@@ITF64SUFFIX@
 Libs.private: @PARPACK_PC_LIBS_PRIVATE@
-Cflags: -I${includedir}
+Cflags: -I${includedir}/arpack@ITF64SUFFIX@
diff --git a/SRC/Makefile.am b/SRC/Makefile.am
--- a/SRC/Makefile.am
+++ b/SRC/Makefile.am
@@ -33,3 +33,8 @@
 libarpack@LIBSUFFIX@@ITF64SUFFIX@_la_LIBADD += $(top_builddir)/ICB/libdbgicb.la $(top_builddir)/ICB/libstaicb.la
 libarpack@LIBSUFFIX@@ITF64SUFFIX@_la_CPPFLAGS = $(AM_CPPFLAGS) -I$(top_builddir)
 endif
+
+pkgconfig_DATA = arpack@LIBSUFFIX@@ITF64SUFFIX@.pc
+
+# Due to the LIBSUFFIX/ITF64SUFFIX, configure doesn't automatically clean this file:
+DISTCLEANFILES = arpack@LIBSUFFIX@@ITF64SUFFIX@.pc
diff --git a/pkg-config/arpack.pc.in b/SRC/arpack.pc.in
rename from pkg-config/arpack.pc.in
rename to SRC/arpack.pc.in
--- a/pkg-config/arpack.pc.in
+++ b/SRC/arpack.pc.in
@@ -1,7 +1,7 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
-includedir=@includedir@/arpack@ITF64SUFFIX@
+includedir=@includedir@
 
 Name: @PACKAGE_NAME@
 Description: Collection of Fortran77 subroutines designed to solve large scale eigenvalue problems
@@ -9,4 +9,4 @@
 URL: @PACKAGE_URL@
 Libs: -L${libdir} -larpack@LIBSUFFIX@@ITF64SUFFIX@
 Libs.private: @ARPACK_PC_LIBS_PRIVATE@
-Cflags: -I${includedir}
+Cflags: -I${includedir}/arpack@ITF64SUFFIX@
diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -347,14 +347,12 @@
 AC_SUBST([PARPACK_PC_LIBS_PRIVATE], ["$LAPACK_LIBS $BLAS_LIBS $MPI_Fortran_LIBS"])
 
 AC_CONFIG_FILES([
-	arpack$LIBSUFFIX$ITF64SUFFIX.pc:pkg-config/arpack.pc.in
-	parpack$LIBSUFFIX$ITF64SUFFIX.pc:pkg-config/parpack.pc.in
+	SRC/arpack$LIBSUFFIX$ITF64SUFFIX.pc:SRC/arpack.pc.in
+	PARPACK/SRC/MPI/parpack$LIBSUFFIX$ITF64SUFFIX.pc:PARPACK/SRC/MPI/parpack.pc.in
 ], [], [LIBSUFFIX="$LIBSUFFIX"; ITF64SUFFIX="$ITF64SUFFIX"])
 
 dnl We do NOT want arpackng*.cmake files to be created: @MPI@ can not be replaced.
-AC_CONFIG_FILES([
-	tstAutotoolsInstall.sh:pkg-config/tstAutotoolsInstall.sh.in
-], [], [abs_top_builddir="$abs_top_builddir"])
+AC_CONFIG_FILES([tstAutotoolsInstall.sh], [chmod +x tstAutotoolsInstall.sh], [abs_top_builddir="$abs_top_builddir"])
 
 AC_CONFIG_FILES([
 	arpackdef.h
diff --git a/pkg-config/tstAutotoolsInstall.sh.in b/tstAutotoolsInstall.sh.in
old mode 100755
new mode 100644
rename from pkg-config/tstAutotoolsInstall.sh.in
rename to tstAutotoolsInstall.sh.in